/*
 * Copyright 2011 Andy Lee.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package uk.co.optimisticpanda.remoteweb.command.xml

import groovy.xml.MarkupBuilder
import uk.co.optimisticpanda.remoteweb.command.CommandSet

void marshal(Writer writer, CommandSet set){
	def xml = new MarkupBuilder(writer)
	xml.setOmitEmptyAttributes( true)
	xml.setOmitNullAttributes( true)
	
	xml.commandset(){
		xml.variables() {
			set.variables.each{  xml.variable(name:it.name, value:it.value)}
		}
		xml.commands() {
			set.commands.each{  marshalCommand(xml, it) }
		}
	}
}

private def marshalCommand(builder, element){
	if(element.isContainer()){
		builder.container(description: nullBlank(element.description)){
			element.children.each{ marshalCommand(builder,it) }
		}
	}else{
		executable = element.executable;
		if(executable){
			builder."$executable.type"(executable.type.getAttributes(element.description, executable.args))
		}
	}
}

private nullBlank(result){
	if(! (String.valueOf(result))){
		return null;
	}
	result
}

